3FE exhaust on 2F head (1 Viewer)

[Oakley40]

Followed the same path, but have yet to get it going. Hoping for the same results.

 

[Godwin]

Five years and ca. 80k miles with the setup and no exhaust manifold leaks.

 

[SteveH]

When your shop created the new 'y' pipe (which looks great and is in a far better location), does it flow into a larger downstream pipe? Your pictures don't show anything but the 'y' joint and I assume it does, but can't tell.

 

[Godwin]

When your shop created the new 'y' pipe (which looks great and is in a far better location), does it flow into a larger downstream pipe? Your pictures don't show anything but the 'y' joint and I assume it does, but can't tell.

The "Y" pipe is formed from 2" tubing and that diameter continues for the remainder of the exhaust. Seems good enough for my high mileage 2F. Also only have a muffler installed, no cat.

 

[CruisingTheLand]

Wanted to add to the knowledge base without making a whole new thread. For older models (‘73 w/ 1.5F), the intake manifold fits well with 3FE exhaust without needing the heat riser ground down.

 

[4Cruisers]

Wanted to add to the knowledge base without making a whole new thread. For older models (‘73 w/ 1.5F), the intake manifold fits well with 3FE exhaust without needing the heat riser ground down.

View attachment 2897574View attachment 2897575

Thanks for the info. I'll be ready to do the same later this spring - 3FE exhaust manifolds and '71 F engine intake manifold on a '76 2F long block.

 

[CruisingTheLand]

Thanks for the info. I'll be ready to do the same later this spring - 3FE exhaust manifolds and '71 F engine intake manifold on a '76 2F long block.

Shouldn’t be hard at all. I used OEM gasket, nuts, washers, studs, and ground the exhaust manifold tabs down to 10mm from 15mm. Kept them all within like .05mm of the intake tabs.

 

[JKIII FJ40]

Wanted to add to the knowledge base without making a whole new thread. For older models (‘73 w/ 1.5F), the intake manifold fits well with 3FE exhaust without needing the heat riser ground down.

View attachment 2897574View attachment 2897575

nice pic and feedback on the 3fe exhaust on 1.5f, hate to ask but who built your down pipe and can you take some more pictures of the Y pipe and other connections. Curious how and where it was routed and what diameter pipe you ran post Y pipe. Thanks

 

[CruisingTheLand]

nice pic and feedback on the 3fe exhaust on 1.5f, hate to ask but who built your down pipe and can you take some more pictures of the Y pipe and other connections. Curious how and where it was routed and what diameter pipe you ran post Y pipe. Thanks

I was fortunate to have a buddy who welded it up for me. It’s 2 1/4” OD so probably 2” ID all the way back. Maybe not ideal, but *tractor*

 

[Seth S]

You could get some bends from Burns stainless and use them to weld up a nice stainless down pipe.

 

[HemiAlex]

Just leaving these here for those that don’t want to fab head pipes. They fit correctly and worked well.

I used these on my 62 and I would do the same for my 60 if and when I add the 3FE manifolds to my 2F.

 

[Godwin]

Just leaving these here for those that don’t want to fab head pipes. They fit correctly and worked well.

I used these on my 62 and I would do the same for my 60 if and when I add the 3FE manifolds to my 2F.

View attachment 3016402

View attachment 3016406

View attachment 3016408

Our 3FE is badly in need of exhaust work. We purchased two of the front right pipes to have these connected in a Y fashion. I'm expecting a clearance issues with the pipes but we'll face that when the time comes. Local exhaust shop is good at making things work. My goal is to have all of the 3FE exhaust within the frame rails.

 

[JKIII FJ40]

View attachment 3016363View attachment 3016364View attachment 3016365

I was fortunate to have a buddy who welded it up for me. It’s 2 1/4” OD so probably 2” ID all the way back. Maybe not ideal, but *tractor*

thanks for sharing!

 

[Spike Strip]

@HemiAlex

What CATs are those?

 

[HemiAlex]

What CATs are those?

Davico. I don’t think they’re California rated.

The 62 was heavily sludged from the egr both in the crankcase and the top end. I decided to leave all the egr working, leave the cats and let the oem ecm manage itself.

If it took 300,000 to get that bad, then it’s not going to be a big deal to leave it alone. I wanted it to be modular and not smell.

 

[Spike Strip]

Thanks for posting !

 

[HemiAlex]

Someone’s gotta keep the dream of driving complete piles every day alive.

 

[CruisingTheLand]

Someone’s gotta keep the dream of driving complete piles every day alive.

*Vehicles with character

 

[mczcars]

I know this is an old post but I do have a question for you, did changing the manifolds did you get any more power or gas mileage?? did the drive ability change Low end torque for wheeling or around a town or freeway driving ?? thanks

 

[chelo]

I know this is an old post but I do have a question for you, did changing the manifolds did you get any more power or gas mileage thanks

I definitely felt more power when I installed mine. Better low end torque and it actually makes the engine rev faster and higher. Makes the power band feel longer too. It's a win win